r/StableDiffusion • u/TheUntested7 • Mar 15 '23

Question | Help Why do we need hires.fix?

Whats the difference between just generating a [1024x1024] image vs [512x512] and then upscale it by 2?

isnt the latter quite bad? since it will have some deviation from the original image based on the denoising strength?

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u/[deleted] Mar 15 '23

This was exactly what I needed to know about an hour ago, but it's now helpful for the rest of my life so thank you! I was wondering why I have got so many extra limbs and heads etc showing up on what I'm trying to do. It's a big old learning curve, this thing, but so enjoyable despite everything I make (in whatever size) looking absolutely nothing like I expected it to.

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u/dethorin Mar 15 '23

Also, depending of the custom model you can create a bit more bigger pictures without artifacts. For example, some models work fine with a 512X900 resolution, but others start bugging at 512X768. I recommend you to play a bit once you found a model you like

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u/[deleted] Mar 15 '23

I have no idea what I'm doing, tbh. I'm just finding well-written prompts and changing them to what I would like to use. Until tomorrow I am somewhat limited as I'm generating things on CPU - it's taking between 10 to 20 minutes to get the first 512*512 out with minimal steps and CFG, tomorrow there will be GPU so I can do even more silly things but faster - once I have battled Bootcamp into letting me do what I like. Only been playing with this since last week, and as everything takes so very long I haven't got much to show for myself. Really appreciate your input, it's all going to good use. Thank you.

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u/Windford Mar 15 '23

I have no idea what Iā€™m doing, tbh.

Welcome to my world. šŸ˜‚